The Sony XT-100HD states that all it needs is a head unit that accepts sat radio.
http://www.etronics.com/p-38626-sony-xt100hd-sony-xt100hd-hd-radio-tuner.aspx?dp=2212C252E6223253E3836383B3570373637363335313&svbname=403&bname=GoogleBase
I am having trouble deciding if this could work with teh D3? For 20 bucks after rebate I might try - anyone else have any experience in this? I already have Sirius and want to try HD radio(just for the sake of trying it).
Also there is a 50 dollar rebate http://ak.buy.com/buy_assets/retail/pdfs/08Q2/0630-0929db_50HDradio.pdf
